What happens when you titrate NaOH with HCl?
During the course of the titration, the titrant (NaOH) is added slowly to the unknown solution. Up to the equivalence point, the solution will be acidic because excess HCl remains in the flask. After the equivalence point, there will be an excess of NaOH and the solution will be basic.
How does KHP titrate with NaOH?
The titration of NaOH with KHP involves adding NaOH from the burette to a known volume of KHP. The molarity of the KHP solution is determined from the mass and volume of KHP used to prepare the KHP solution. The data from the titration is then used to calculate the molarity of the NaOH.
Why do we use KHP instead of HCl to standardize the NaOH solution?
Most likely because the HCl you are using is a poor primary standard. KHP has the benefit of being a stable solid with well know properties, which means if you have a precise/accurate balance you can get very good numbers on the concentration of your NaOH solution.
What is the equivalence point of KHP and NaOH?
So, you know that at equivalence point, the reaction will consume 0.0024973 moles of KHP and 0.0024973 moles of NaOH , since that’s what the 1:1 mole ratio tells you.
What is the balanced equation of HCl and NaOH?
NaOH + HCl → NaCl + H2O 2.
How do you titrate hydrochloric acid?
- Pipette aliquot of hydrochloric acid solution into 250mL Erlenmeyer flask.
- Dilute with distilled water to about 100 mL.
- Add 2-3 drops of phenolphthalein solution.
- Titrate with NaOH solution till the first color change.
How do you standardize HCl with NaOH?
Standardisation procedure One way of doing this (for a 0.1M NaOH solution) is to pipette 20.00 mL of standard 0.100 M HCl into a flask and adding a couple of drops of phenolphthalein indicator. Then fill your burette with the NaOH solution and titrate the HCl until the colour changes to a pale permanent pink.
What is the molarity of NaOH when titrated with KHP?
Molarity of NaOH = (mol KHP)/ (V NaOH used for titration): M(NaOH)=0,00213mol0,03103L=0,0688molL . Since NaOH is monovalent its molarity is equal to its Normality =0,0688 (eq)/L.
Can you standardize NaOH with HCl?
Standardisation procedure The true concentration of NaOH solutions should therefore be determined by standardising them regularly with a standard hydrochloric acid (HCl) solution. Then fill your burette with the NaOH solution and titrate the HCl until the colour changes to a pale permanent pink.
Which indicator is used in standardization of NaOH with potassium hydrogen phthalate KHP?
To standardize a sodium hydroxide (NaOH) solution against a primary standard acid [Potassium Hydrogen Phthalate (KHP)] using phenolphthalein as an indicator.
What type of reaction is NaOH and HCl?
This reaction involve an acid (HCl) reacting with a base (NaOH), producing a salt (NaCl) and water. Therefore it’s a neutralization reaction.